《视频会议系统H.323与SIP互通网关的设计与实现硕士学位论文》由会员分享，可在线阅读，更多相关《视频会议系统H.323与SIP互通网关的设计与实现硕士学位论文（61页珍藏版）》请在金锄头文库上搜索。
1、硕士学位论文视频会议系统H.323与SIP互通网关的设计与实现专 业 名 称： 软件工程 研究生姓名： 温泉 导 师 姓 名： 翟 玉 庆 倪 庆 剑 THE DESIGN AND IMPLEMENTATION OF INTERWORKING GATEWAY BETWEEN H.323 AND SIP ON VIDEO CONFERENCE A Thesis Submitted toSoutheast UniversityFor the Academic Degree of Master of EngineeringBYWEN QuanSupervised byProf. ZHAI Yu-qi
2、ngandDr. NI Qing-jianCollege of Software EngineeringSoutheast UniversityJune 2014东 南 大 学 学 位 论 文 独 创 性 声 明本人声明所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的研究成果。尽我所知，除了文中特别加以标注和致谢的地方外，论文中不包含其他人已经发表或撰写过的研究成果，也不包含为获得东南大学或其它教育机构的学位或证书而使用过的材料。与我一同工作的同志对本研究所做的任何贡献均已在论文中作了明确的说明并表示了谢意。研究生签名：日 期： 东 南 大 学 学 位 论 文 使 用 授 权 声 明
3、东南大学、中国科学技术信息研究所、国家图书馆有权保留本人所送交学位论文的复印件和电子文档，可以采用影印、缩印或其他复制手段保存论文。本人电子文档的内容和纸质论文的内容相一致。除在保密期内的保密论文外，允许论文被查阅和借阅，可以公布（包括刊登）论文的全部或部分内容。论文的公布（包括刊登）授权东南大学研究生院办理。研究生签名： 导师签名： 日 期：摘要视频会议系统又称会议电视系统，是指两个或两个以上不同地方的个人或群体，通过传输线路及多媒体设备，将声音，影像及文件资料互相传输，实现即时互动的沟通。随着视频会议技术的日益成熟，视频会议系统在世界范围内各大中小型企业中的使用越来越普及，而主流视频会议系
4、统是基于国际电信联盟制定的H.323协议与互联网工程组提出的SIP协议，H.323协议技术成熟、应用广泛，但较为复杂、繁琐，而SIP协议相对于H.323协议出现较晚，具有容易理解，易于实现的特点，因此发展迅速。因此基于两种不同协议的视频会议终端之间的互通成为了当下趋势，本课题正是在此背景下进行的研究和开发。本文设计并实现了视频会议系统H.323与SIP互通网关，网关基于H.323与SIP协议栈，对分别基于H.323与SIP协议的终端提供了良好的互通功能。具体的，本文针对互通网关的开发做了如下工作：一通过研究对比H.323协议和SIP协议的特点和优劣势，具体探讨了两种不同协议的呼叫流程，消息解析
5、，消息响应方式，提出了协议转换的解决方案，设计了互通网关的架构。二在互通网关软件架构的具体设计中，通过对协议间通信机制的分析，提出了模块化的设计方案，提高了互通网关的开发效率，减少了维护成本。三通过延伸的需求分析，为即时发现互通网关的bug，保证其在提供服务时的稳定性，特别增加了日志系统，以便在问题发生时准确的跟踪定位出根因。论文的研究工作基本解决了互通网关设计过程中的一些关键技术问题，满足了视频会议系统中分别基于H.323协议与SIP协议终端的互通、支持多种视音频协议以及通过日志系统迅速定位问题根因等需求，系统安全性和可靠性高，报警实时，具有很好的工程应用价值。关键词：H.323协议，SIP
6、协议，互通网关，消息解析AbstractVideo conference system is also called the conference television system, refers to two or more than two different parts of the individual or groups, Via the transmission lines and multimedia equipment, sound, image and file data can be transmitted with each other, realizing real-
7、time interactive communication. With video conference technology becoming more and more mature, video conference system within the scope of small and medium-sized enterprises are widely used around the world. And mainstream video conferencing system is based on the H.323 protocol developed by the in
8、ternational telecommunication union and the SIP protocol proposed by the Internet engineering group. The technology of H.323 protocol is mature and widely used, but it is more complex and tedious. However, compared with the H.323 protocol, SIP protocol appeared later but it has the characteristics o
9、f easy-understanding, easy-implement and developing rapidly. So the interworking gateway between terminals of video conference based on two different protocols has become the trend. And the topic is the under the background of the research and development of that. This paper designed and implemented
10、 of video conference system H.323 and SIP interworking gateway. The gateway is based on H.323 and SIP protocol stack and provides a great interworking function for the terminal based on H.323 and SIP protocol. Specifically, this papermade the following work for the development of the gateway as foll
11、ows:Firstly, by comparing with the characteristics, advantages and disadvantages of H.323 and SIP protocol, specifically discussed the analysis of two different protocols in the calling process, message parsing and message response mode field. I put forward the solution of transformation between dif
12、ferent protocols and design the architecture of the interworking gateway.Secondly, I put forward the modular design to improve the efficiency of the development and to reduce maintenance costs of the system in the architecture of the interworking gateway after analyzing the communication mechanism b
13、etween the proposed protocols.Thirdly, in order to detect the real time errors in the interworking gateway, the logging system is needed to track and position the problems occurred in the system which is running, so that the security and stability is always being guarantee.The research work of this
14、thesis has basically solved some key technical problems in the interworking gateway in the design process and satisfies many needs, For example, the interchanges terminal based on H.323 protocol and SIP protocol can support for multiple video and audio protocols. And it could quickly position the pr
15、oblems by logging system in the video conference system. It has friendly man-machine interface, high system reliability and security, alarm in real-time, and has great value in engineering application.Keywords: H.323 protocols, SIP protocol, communication gateway, message parsing目录摘要IAbstractII目录I第一章 绪论11.1 研究背景11.2 研究动机与目的11.3 国内外研究现状21.3.1 发展历史21.3.2 国内外主要厂商及产品21.3.3 DCS和FCS31.4 章节安排4第二章 通信方式及相关技术原理分析52.1 现场总线技术52.1.1 现场总线发展历史及标准化52.1.2 现场总线技术特点62.1.3 监控报警系统组网方案选择62.2 CAN总线72.2.1 CAN的一些基本概念和特点82.2.2 四种数据帧及帧
